NetSec-Architect Practice Question: NGFW And Cloud Delivered Security Services Architecture
A network architect is designing an architecture where branch offices connect to a hub Palo Alto Networks NGFW via IPsec VPNs. The architect needs to ensure that application traffic originating from branch users is identified accurately even when applications use non-standard ports (e.g., HTTP running on port 8080). Which PAN-OS feature performs this identification?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
App-ID engine inspecting packet payloads and application signatures dynamically regardless of port numbers.
App-ID uses deep packet inspection, application signatures, and heuristic analysis to identify applications regardless of port numbers, distinguishing actual application traffic from standard port definitions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
App-ID engine inspecting packet payloads and application signatures dynamically regardless of port numbers.
Why this is correct
App-ID identifies the actual application based on signatures and behavior, ignoring underlying TCP/UDP port numbers.
- ✗
User-ID agent mapping source IP addresses to Active Directory group memberships.
Why it's wrong here
User-ID maps users to IP addresses, not applications to ports.
- ✗
Port-based Layer-4 dynamic remapping rules configured within the IPsec crypto profile.
Why it's wrong here
IPsec crypto profiles handle encryption parameters, not application identification.
- ✗
URL Filtering cloud categorization matching destination IP addresses to standard port maps.
Why it's wrong here
URL Filtering evaluates web URLs and categories, not non-web application traffic running on arbitrary ports.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Palo Alto Networks exam blueprint
This NetSec-Architect practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NetSec-Architect exam.